398790166 has 8 divisors (see below), whose sum is σ = 602489160. Its totient is φ = 197960448.

The previous prime is 398790157. The next prime is 398790187. The reversal of 398790166 is 661097893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 716971 + ... + 717526.

It is an arithmetic number, because the mean of its divisors is an integer number (75311145).

Almost surely, 2^398790166 is an apocalyptic number.

398790166 is a deficient number, since it is larger than the sum of its proper divisors (203698994).

398790166 is a wasteful number, since it uses less digits than its factorization.

398790166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434638.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 398790166 is about 19969.7312450619. The cubic root of 398790166 is about 736.0627051077.

The spelling of 398790166 in words is "three hundred ninety-eight million, seven hundred ninety thousand, one hundred sixty-six".